CHAPTER 6
RS232 CABLING INFORMATION

6.1  DB25 Connector
The communication interface follows the EIA RS232 standard. The signal assignments for a standard DB25 connector are shown below:

25 ˇV PIN D-SHELL

To connect the PCCOM 2 port adapter to other DATA TERMINAL EQUIPMENT (DTE) devices, we recommend using a DTE to DTE connection as shown below:

ˇ@

6.2 Null Modem Connections: RS232

If the software supplier or operating system does not specify a particular cable configuration, we recommend you use the following ˇ§null modemˇ¨ cable when XON/XOFF is utilized.



If hardware handshaking is necessary, use the following cable:

Some serial devices have the buffer control signal on pin 19, in which case pin 6 on the host is connected to pin 19 on the remote device.

6.3 Modem Connections   

A straight through cable is required, e.g. pin 2 to pin 2, pin 3 to pin 3, etc.



6.4 DB9 Connector

 The signal assignments for a standard DB9 connector are shown below :